Dangerous goods quick reference guide - Class 2: Gases

Classification:

Gases are divided into three divisions:

2.1 Flammable Gases: Ignite in air or contribute to fire; sensitive to temperature changes.
Examples: Acetylene, butane, propane, LPG, hydrogen, aerosols.
2.2 Non-Flammable, Non-Toxic Gases: Can cause asphyxiation, oxidization, or explode under pressure.
Examples: Carbon dioxide, helium, nitrogen, oxygen, argon.
2.3 Toxic Gases: Harmful or fatal if inhaled.

Examples:

Chlorine, fluorine, methyl bromide, hydrogen fluoride, sulphur dioxide.

Key Handling Guidelines:

• Packing: Use tanks/cylinders per manufacturer’s instructions; never use damaged or overfilled containers; do not repackage without expert advice.
• Storing: Store in well-ventilated, temperature-controlled areas; keep away from heat sources; use leak detectors; inspect regularly; train staff in emergency response.
• Transporting: Ensure ventilation during transport; secure tanks/cylinders tightly; avoid ignition sources near flammable gases; have a security plan for high-consequence cargo; comply with CTU Code.

Handling:

Never throw, drop, or drag cargo; maintain emergency response plans; communicate clearly across the supply chain.